Speaker Placement Visualizer

What this tool does

The Speaker Placement Visualizer is a planning room for home theater and stereo. You see a furnished living room with a sofa, console, coffee tables, and a TV wall, then place the speakers you actually own or plan to buy.

Left and right start as tall tower speakers flanking the screen. The centre channel sits on the console under the TV, which matches how most living rooms are wired. Surrounds begin on the walls slightly behind the sofa, because the small side tables beside the seat are usually too close for a proper surround angle.

You can still drag a surround onto a side table if that is how your room works. The tool snaps the speaker to the table top so you can compare the close placement against a wall mount. Towers stay on the floor unless you raise height yourself. Atmos channels sit near the ceiling and tip slightly downward toward the seat.

Each channel has its own amplifier power and sensitivity. Power is the continuous drive you model for that speaker on the coverage map (often only a few watts for everyday levels). Sensitivity is the loudness rating from the speaker’s specification sheet. Together they decide how strong that channel looks in the map. Separate market rating chips in Results suggest realistic RMS shopping bands after peak headroom; do not treat the low drive figure as the wattage printed on a retail box.

The optional blue overlay (and the always-on heatmap view) shows how loud the room feels at ear height across the floor plan. Brighter blue means more level for the current settings. The overlay is not a paint colour on the wood; leave it off when you want a clear photo-like view of the room, and turn it on when you are judging coverage.

The green marker is the main listening position on the sofa. Stats compare left and right path lengths and levels at that seat so the centre image stays stable. Layout presets follow common home theater angle guidance, then you drag to fit furniture, doorways, and real wall clearances.

This is a direct-sound planning model. It helps you choose positions and rough power before you drill or buy stands. It does not replace measurement microphones, room treatment, or listening tests in your finished space.

How to use it

1. 1Set room width, length, and ceiling height so the living room matches your space as closely as you can.
2. 2Pick a layout preset: stereo for music, 2.1 if you add a subwoofer, 5.1 or 7.1 for surround movies, or an Atmos preset when you have height speakers.
3. 3Confirm the green MLP marker sits on the sofa where you actually sit. The sofa position drives that seat automatically.
4. 4Select the left tower chip. Enter the sensitivity from your speaker sheet and a realistic continuous wattage for everyday listening, then repeat for the right tower so the pair matches.
5. 5Select the centre channel. Keep it on the console unless your design puts the centre above or below the screen on a different shelf; drag it until it snaps if you moved it.
6. 6Review surrounds. Prefer the default wall-side positions first. Only drag onto a side table if furniture forces that compromise, and note how close the seat becomes.
7. 7If your preset includes Atmos, check that height speakers sit near the ceiling above the front or rear of the room, then adjust drag positions so they clear lights and beams.
8. 8Switch to the SPL heatmap and drag speakers on the plan until left and right look even toward the MLP. Watch path delta and L/R balance in the stats strip.
9. 9In the 3D view, leave the blue overlay off while you place furniture-aware positions, then enable Show blue SPL overlay to see whether the sofa sits inside your target loudness.
10. 10Use the suggested Target SPL for your room size (average seat dialogue-style level), or raise or lower it to match how loud you like dialogue and music. Coverage percent tells you how much of the listening plane clears that target.
11. 11Note front-wall clearances for the towers and any subwoofer corner placement. Copy those distances before you mark the floor with tape.
12. 12Lock the plan, then verify by ear and with a simple phone level meter or calibration disc. Use the visualizer as geometry and level guidance, not as the final word on room acoustics.

Practical tips

• Keep left and right towers the same distance from the main seat whenever the room allows. Equal paths keep voices locked in the middle of the screen.
• Match sensitivity on a stereo pair. If one tower is louder on paper, the balance meter will show it even when wattage matches.
• Side tables beside the sofa are handy for lamps, not ideal for surrounds. Expect roughly a right-angle placement and a short throw to your ears if you park speakers there.
• Wall-mounted surrounds a little behind the sofa usually sound more open than speakers perched on the armrest tables.
• The centre channel carries most dialogue. Keep it aimed at the sofa and roughly at ear height when the console allows.
• Subwoofers are less fussy about exact angle and more fussy about corners and walls. Try the default beside the console, then crawl-test in the real room.
• Turn the blue overlay off when you are judging furniture clearances. Turn it on when you are comparing wattage or seat coverage.
• Atmos speakers want height. Leave them near the ceiling unless your kit is up-firing from a cabinet, in which case lower the height field to match.
• Small changes in toe-in can sharpen or soften the centre image. Start with auto toe-in toward the MLP, then nudge a few degrees by ear later.
• If the heatmap looks uniformly hot, lower channel watts toward everyday listening levels so differences between seats become easier to see. The market rating chips still suggest realistic RMS shopping bands for the target SPL and seat distance.
• Door swings, radiators, and walkways matter as much as angles. Drag speakers clear of paths even when the preset looks perfect on paper.
• After TV size or projector screen width is fixed, come back here so the audio centre line still matches the picture centre.

Frequently asked questions

Why is the floor blue sometimes?

That blue layer is a sound coverage map at ear height. Stronger blue means higher predicted level for your current speaker powers. It is not a floor finish. Use the Show blue SPL overlay checkbox in the 3D view, or open the SPL heatmap tab when you want the map always visible.

Where is the main listening position?

The green MLP marker sits on the sofa at the seating line used in the room scene. Stats for balance, path length, and seat loudness are taken there. Move speakers relative to that seat rather than moving the sofa in this version of the tool.

Why are left and right drawn as towers?

Most living-room home theaters use floorstanding fronts beside the TV. Towers show a taller cabinet and multiple drivers so the layout reads clearly. You can still treat them as stand-mounts by lowering height if that matches your kit.

Why does the centre start on the console?

Dialogue speakers almost always live on or in the TV cabinet so the voice comes from the screen. The default snaps the centre to the console top. Drag it only if your centre is wall-mounted above or below the panel.

Can I put surrounds on the side coffee tables?

You can drag Ls or Rs onto a side table and they will snap to the table height. In a typical room those tables sit only about a metre and a quarter beside the sofa, almost at a right angle to your ears. That is usually too close and too sideways compared with wall surrounds slightly behind the seat. Try both and prefer the wider placement when furniture allows.

What do watts and sensitivity mean here?

Sensitivity is how efficiently the speaker turns power into loudness, taken from the manufacturer sheet. Watts in the channel controls are continuous amplifier drive for the SPL map, often only a few watts at a quiet target. Market rating chips in Results add program headroom for music and movie peaks and round up to common RMS shopping bands (for example 50–150 W). Buy speakers and amps in that market range, not at the low continuous drive figure.

What is toe-in yaw?

Toe-in is how much you rotate a speaker toward the listening seat. The tool aims most channels at the MLP when you drag them. You can still type a yaw angle if you want less or more toe-in than the automatic aim.

What do L/R balance and path delta tell me?

Path delta is the difference in distance from left and right to the seat. Balance is the difference in predicted level at the seat. Both near zero usually means a centred voice and a stable stereo image. Large gaps suggest sliding one tower or matching power and sensitivity.

Which layout preset should I start with?

Choose stereo or 2.1 for music-first rooms. Choose 5.1 if you have a centre and a pair of surrounds. Choose 7.1 when you add rear channels. Choose 5.1.2 or 7.1.4 when you have Atmos height speakers. You can disable any channel chip without changing the whole preset.

How do Atmos speakers work in this view?

Height channels (labels like TFL and TFR) sit near the ceiling and face somewhat downward. Drag them in plan view to clear lights and beams, and keep height close to the ceiling unless you use up-firing modules on cabinets.

Does this simulate the whole room’s echo?

No. The model focuses on direct sound from each speaker to the seating plane, with a simple sense of which way each cabinet faces. It does not build a full echo, bass mode, or absorption simulation. Use it for geometry and relative level, then measure and listen in the finished room.

How should I use the heatmap versus the 3D view?

Use 3D to judge furniture, wall mounts, and how the room looks. Use the heatmap when you want precise top-down dragging and a clear coverage map. Many people place roughly in 3D with the overlay off, then fine-tune on the heatmap.

Will this fix a harsh or boomy room by itself?

Good placement removes many imaging and loudness problems, but hard empty rooms still reflect sound. Rugs, curtains, and absorption or diffusion often matter after the geometry is sorted. Treat the visualizer as the first pass, not the only pass.

Can I drag speakers in the 3D room?

Yes. Click a speaker to select it, then drag. Orbit pauses while you drag. Move near the console, a side table, or a wall to snap height. The heatmap offers the same drag behaviour on a flat plan.

More reading

Browse practical planning and design articles in the Guides section.